<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <!-- import CSS -->
    <link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
</head>
<body>
    <div id="app">
    <el-input v-model="input" placeholder="请输入内容"></el-input>
    </div>
</body>

  <!-- import Vue before Element -->
  <script src="https://unpkg.com/vue/dist/vue.js"></script>
  <!-- import JavaScript -->
  <script src="https://unpkg.com/element-ui/lib/index.js"></script>
    <script>
    export default {
      data() {
        return {
          input: ''
        }
      }
    }
    </script>

</html>